Method and device for treating a mixture of expansion gas and filling product foam in a beverage filling plant

ABSTRACT

Various embodiments relate to devices and methods for treating a mixture of expansion gas and filling product foam in a beverage filling plant, comprising the steps of introducing the mixture of expansion gas and filling product foam into a closed separation container and extracting the expansion gas out of the closed separation container via suction.

CROSS REFERENCE TO RELATED APPLICATION

This application is a U.S. National Stage application under 35 U.S.C. §371 of International Application No. PCT/EP2015/080160 filed Dec. 17,2015, which claims priority to DE Patent Application No. 102014118815.2filed Dec. 17, 2014, the contents of each of which are herebyincorporated by reference in their entirety.

TECHNICAL FIELD

The present invention relates to a device and a method for treating amixture of expansion gas and fill product foam in a beverage fillingplant, for example, treating a mixture of CO2 and beer foam.

BACKGROUND OF THE INVENTION

It is known in beverage filling plants to fill carbonated beveragesusing the counter-pressure method, in which, prior to the actual fillingwith the fill product, the container to be filled is pre-pressurizedwith a pressure gas, and the carbonated fill product is then introducedinto the container to be filled, which has been pre-pressurized in thismanner and is hence under pressure. Through the application of thepre-pressure to the container, during the filling process there is noexcessive release, or no release at all, of the CO2 that is present inthe fill product, so that in this manner excessive foaming of the fillproduct can be prevented. The filling process can thereby be carried outquickly and precisely, since the end of the filling process, forexample, when a predetermined fill height is reached, can be determinedprecisely using a fill level probe due to the substantial absence offill product foam. Accordingly, a carbonated fill product can be filledquickly and precisely in this manner.

After the actual filling process, when all fill product is accommodatedin the now filled container, the container is still at an overpressure.In particular, the head space of the container contains gas underpressure, which is substantially a mixture of the CO2 that is present inthe carbonated fill product and the pre-pressurization gas. When thepre-pressurization gas is also CO2, the gas present in the head space isthus substantially CO2 under pressure.

Before the container can be conveyed to a further processing step, forexample, a capper, it must be detached from the applicable fillingelement. Prior to this, the overpressure in the head space of thecontainer must accordingly be relieved. For this purpose, theoverpressure is relieved in a controlled manner by opening a reliefvalve. The opening of the relief valve establishes a fluid communicationvia a relief line between the head space of the container and thesurrounding area, such that the overpressure present in the head spaceof the container can be relieved into the surrounding area when therelief valve is opened.

In the case of carbonated beverages, however, this leads to foaming ofthe fill product because the rapid relief of pressure in the head spacecauses spontaneous release of CO2 from the fill product to take place.This tendency to foam is particularly pronounced when beer is filled.The foam that arises in this way can then pass through the relief valvetogether with the expansion gas and enter the relief channel, throughwhich it gradually travels. The mixture of expansion gas and fillproduct foam that is thereby present in the relief channel escapes fromthe end of the relief channel in an uncontrolled manner. At the end ofthe relief channel, the fill product foam usually drips onto the floorof the filling hall or into a gully.

The concentrations of the expansion gas, for example, CO2, that arise inthe filling hall are in some cases undesirable.

SUMMARY

Proceeding from the known state of the art, an improved method andcorresponding device are provided for treating a mixture of expansiongas and fill product foam in a beverage filling plant.

In one embodiment, treating a mixture of expansion gas and fill productfoam in a beverage filling plant is performed with the features of claim1. Advantageous further developments of the method arise from thedependent claims, from this description, and from the figures.

Accordingly, a method for treating a mixture of expansion gas and fillproduct foam in a beverage filling plant is disclosed. The methodincludes introducing the mixture of expansion gas and fill product foaminto a closed separation container and extracting the expansion gas outof the closed separation container via suction.

The mixture of expansion gas and fill product foam is introduced into aclosed separation container and the expansion gas is extracted from theseparation container, such that: firstly, contamination of the areasurrounding the beverage filling plant by the expansion gas is avoided,and thus impairment of the health of filling plant staff due to theexpansion gas can be reduced or avoided; and secondly, contamination ofthe area surrounding the beverage filling plant with fill product foamcan be avoided due to the closed design of the separation container.

Accordingly, there is a reduction in contamination, by both theexpansion gas and the fill product foam, of the area directlysurrounding the beverage filling plant. Thus, impairment of the healthof staff can be reduced, and a filling process that is altogether morehygienic and more aesthetically acceptable is made possible.

In one exemplary embodiment of the method, a fluid medium is applied bysprinkling to the mixture of expansion gas and fill product foam that isintroduced into the closed separation container. Application of thefluid medium achieves the suppression and liquefaction of the fillproduct foam in the separation container, and accordingly preventssuction of the fill product foam into the suction extractor and out ofthe closed separation container.

In a further exemplary embodiment of the method, in order to sprinklethe mixture of expansion gas and fill product foam, the fluid medium isextracted from the closed separation container from, for example, alower area of the closed separation container and the fluid medium isrecirculated.

In this manner, through recirculation, it is possible in an economicallyand environmentally favorable manner to sprinkle the mixture ofexpansion gas and fill product foam continuously, uniformly,periodically or as required, such that restriction of the fill productfoam within the closed separation container to a low level can bereliably achieved. In addition, through the recirculation of the fluid,an economical design is achieved, since a constant supply of fresh wateris unnecessary, and instead the fluid medium can be reused forsprinkling.

In a lower area, for example, a sump, of the closed separationcontainer, a fluid medium can be provided, which can then be extractedfor sprinkling the mixture of expansion gas and fill product foam in themanner described above.

The fluid medium can originally be a supply of fresh water. Throughouttreatment of the mixture of expansion gas and fill product foam, thefluid medium is increasingly mixed with components of the fill productfrom the suppressed and liquefied fill product foam.

The fluid medium from the closed separation container, together with thefill product foam that has been liquefied by sprinkling, can be conveyedout of the closed separation container continuously, periodically or asrequired. If it is removed as required, this can be initiated, forexample, when a time condition is satisfied or when a fill height of thefluid medium in the closed separation container is reached, such thatwhen a specified fill height is reached, the excess fluid is extractedfrom the closed separation container. The fluid that is removed can, forexample, be conveyed to a waste water pipe.

In order to achieve an efficient separation of the fill product foam, orthe fill product components, from the mixture of expansion gas and fillproduct foam as soon as it enters the closed separation container, theinflow of the mixture of expansion gas and fill product foam can takeplace tangentially in a cylindrical or conical separation container,such that, due to the centrifugal forces in effect, there occurs a firstdisplacement of the fill product foam to the interior wall of the closedseparation container, and thereby a separation of expansion gas and fillproduct foam.

In the closed separation container, the expansion gas can be extractedvia suction above the sprinkler, so that it is possible to avoid thefill product foam being sucked in by the suction extractor.

In another exemplary embodiment of the present invention, for thepurpose of cleaning, a cleaning and/or sterilization medium isintroduced into the closed separation container and subsequentlyconducted out of it, wherein the cleaning and/or sterilization medium issprayed onto the interior wall of the closed separation container, andconducted out of the closed separation container in its lower area. Inthis manner, hygienic cleaning of the separation container can beachieved. Further, a clean-in-place (CIP) medium can also be conveyedthrough a relief channel to a filler valve, and/or from the filler valvethrough the relief channel into the closed separation container.

The term “closed separation container” is understood here to mean thatit has no direct connection with its surrounding area. Instead, theconveying of media and fluids into the closed separation container, andthe conveying of media and fluids out of the closed separationcontainer, take place only in a controlled manner via suitable pipework.

Accordingly, the mixture of expansion gas and filling product foam isconveyed in a controlled manner within a closed system, and furthermore,the expansion gas is also conveyed in a controlled manner within aclosed flow, so that the expansion gas can be, for example, dissipatedin a controlled manner via a chimney without the expansion gas enteringthe filling hall.

In another embodiment, a device with the features of claim 9 is used fortreating a mixture of expansion gas and fill product foam in a beveragefilling plant. Advantageous further developments arise from thedependent claims.

In one exemplary embodiment, a device for treating a mixture ofexpansion gas and fill product foam in a beverage filling plantcomprises a closed separation container into which a relief line whichconveys the mixture of expansion gas and fill product foam discharges,wherein the expansion gas is extracted via suction from the separationcontainer through a suction extractor. According to the embodiment, theseparation container is closed.

This results in the same advantageous effects as those described abovein connection with the method.

In one embodiment, a sprinkler nozzle is provided in the closedseparation container, where the sprinkler nozzle applies a fluid mediumto the mixture of expansion gas and fill product foam that is present inthe closed separation container. Sprinkling can achieve the suppression,destruction or liquefaction of the fill product foam in the closedseparation container.

In one embodiment, an outlet is provided in a lower area, for example, asump, of the closed separation container, and the outlet is in fluidcommunication with the sprinkler nozzle, so that the fluid medium can bepumped in circulation from the lower area of the closed separationcontainer to the sprinkler nozzle.

In one embodiment, a suction extractor for extracting the expansion gasis provided in fluid communication with the closed separation container,and is disposed above the sprinkler nozzle.

In one embodiment, the closed separation container is substantiallycylindrical and/or conical in design, and the relief line istangentially introduced into the closed separation container.

In one embodiment, a CIP nozzle is provided in the closed separationcontainer to impinge on the interior wall of the closed separationcontainer, and a lower area of the closed separation container is influid communication with a CIP return line.

BRIEF DESCRIPTION OF THE DRAWINGS

Further exemplary embodiments of the invention are more fully explainedby the description below of the figures. The figures show:

FIG. 1 is a schematic representation of a beverage filling plant with afiller carousel, a valve cluster and a device for treating a mixture ofan expansion gas and fill product foam with a closed separationcontainer;

FIG. 2 is a schematic side representation of a device for treating amixture of an expansion gas and fill product foam; and

FIG. 3 is a schematic perspective representation of the device from FIG.2.

DETAILED DESCRIPTION

Example embodiments are described below with the aid of the figures. Inthe figures, elements which are identical or similar, or have identicaleffects, are designated with identical reference signs. In order toavoid redundancy, repeated description of these elements is in partdispensed with in the description below.

FIG. 1 shows schematically a beverage filling plant 100 with aschematically indicated filler carousel 110 which has rotary mediumdistributor channels 120 to 128 (also indicated schematically), whichare provided to deliver media from the stationary part of the beveragefilling plant to the rotating filler carousel 110.

The outer rotary medium distributor channel 120 is provided forsupplying fill product and—during the cleaning and sterilization of thebeverage filling plant 100—cleaning and sterilization medium to thefiller carousel 110. The second rotary medium distributor channel 122 isprovided for supplying CO2 as rinsing gas and/or as pressurization gas.The third rotary medium distributor channel 124 is provided as a reliefchannel for relieving pressure in the head space of each filledcontainer after filling, and accordingly transports a mixture of theexpansion gas (e.g., CO2) and fill product foam that is carried alongwith the expansion gas.

A further rotary medium distributor channel 126 is provided for creatinga vacuum or an underpressure, which is provided for switching the fillervalve and/or for evacuating the container to be filled prior to filling.A further rotary medium distributor channel 128 is provided as aclean-in-place (CIP) return flow line for CIP cleaning or sterilization.

The supply and/or discharge, as well as the control of the supply ofeach medium to the rotary medium distributor and the correspondingrotary medium distributor channels 120 to 128, takes place via a valvecluster 130, which in the example embodiment shown is provided in thestationary part of the beverage filling plant 100, and which can chargethe rotary medium distributor channels 120 to 128 with the applicablemedia in a controlled manner.

The fill product, or—during cleaning or sterilization—a cleaning orsterilization medium in the form of a CIP medium, flows via a fillproduct intake 132 into the valve cluster 130. A CIP return flow line134 is provided, through which the CIP medium can accordingly bereturned to a CIP station during cleaning or sterilization in order toprocess or replace the CIP medium. Gaseous CO2 is also supplied to thevalve cluster 130 via a CO2 supply line 136, in order to use this gas asa pre-pressurizing and rinsing medium in the container to be filled. Avacuum connection 138 is further provided, through which a vacuum can beprovided in a switchable manner in the valve cluster 130.

A device 1 for treating a mixture of expansion gas and fill product foamis also provided in the beverage filling plant 100. The mixture ofexpansion gas and fill product foam is supplied to the device 1 via arelief line 20. The relief line 20 thus conveys both the expansion gasand the fill product foam that is carried along by the expansion gas.

The device 1 comprises a closed separation container 2, into which amixture of expansion gas (e.g., CO2) and fill product foam is introducedfrom the valve cluster 130 via the relief line 20, when, in the courseof the relief of pressure in the head space of a filled container,expansion gas is discharged in a controlled manner via the valve cluster130, and fill product foam is thereby carried along.

The separation container 2 may be substantially cylindrical or conicalin design, and the relief line 20 discharges into the closed separationcontainer 2, for example, into a lower area of the closed separationcontainer 2 and tangentially.

Because the separation container 2 is, for example, substantiallycylindrical or conical in design, when the mixture of expansion gas andfill product foam is introduced tangentially via the relief line 20,depositing of the fill product foam on the interior wall of the closedseparation container 2 can be achieved by centrifugal forces alone.

The expansion gas (e.g., CO2) can be extracted from the upper area ofthe closed separation container 2 by a suction extractor 22.

Through the provision of the closed separation container 2 incombination with the suction extractor 22, it is possible to avoid theformation of an increased concentration of expansion gas, for example,an increased concentration of CO2, in the area of the beverage fillingplant 100, which could damage or impair the health of staff at thebeverage filling plant 100. The suction extractor 22 thereby may extractthe expansion gas via suction into an exterior area located at adistance from the beverage filling plant 100, and convey the expansiongas through a chimney, or through a fan via the roof of the hall oranother area, out of the room in which the beverage filling plant 100 isdisposed.

In the lower area of the closed separation container 2, a sump 24 isprovided, which in the schematically shown example embodiment is filledwith a fluid medium 240. At the beginning of the treatment of themixture of expansion gas and fill product foam, the fluid medium 240 is,for example, fresh water. During the separation of the fill productfoam, however, the fresh water is mixed with components of the fillproduct which have been transported by the fill product foam into theclosed separation container 2.

At the lowest position on the closed separation container 2, forexample, its sump 24, an outlet 242 is provided, via which the fluidmedium 240 can be extracted from the closed separation container 2. Thefluid medium 240 is pumped by a pump 244 into a sprinkler nozzle 3, sothat the fluid medium 240 is sprinkled onto the mixture of expansion gasand fill product foam that is present in the closed separation container2. By sprinkling of the mixture of expansion gas and fill product foam,the fill product foam in the closed container is suppressed, and thebubbles in the fill product foam are progressively burst, so that thefill product foam is substantially liquefied.

Via the outlet 242 provided in the lower area of the closed separationcontainer 2 and the pump 244, the fluid medium 240 can thus be sprinkledon the fill product foam that accumulates in the closed separationcontainer 2. Accordingly, the fill product foam supplied via the reliefline 20 is sprinkled in such a manner that the fill product foam can besuppressed and an excessive rise in the level of the fill product foamin the closed separation container 2 can be prevented, such that it ispossible to prevent the fill product foam from being sucked in by thesuction extractor 22 for the expansion gas.

The sprinkling of the fill product foam through the sprinkler nozzle 3further achieves the destruction of the fill product foam, andaccordingly only the components of the fill product that are transportedby the fill product foam are present, in liquid or particulate form, andare collected in the sump 24.

Via a fresh water supply line 246, the sprinkler nozzle 3 can also befed with fresh water. This is in particular carried out when the sump 24is to be refilled with fluid medium 240, for example, at the beginningof each treatment procedure.

In order to carry out the method for treating a mixture of expansion gasand fill product foam, a mixture of the fill product foam and theexpansion gas is accordingly introduced via the relief line 20 into theclosed separation container 2. At the same time, through the sprinklernozzle 3, a fluid medium 240 is applied to the fill product foam thataccumulates in the closed separation container 2, in order thereby tosuppress or destroy the foam. The fluid medium 240 that is applied viathe sprinkler nozzle 3, along with the components, or liquefyingcomponents, of the fill product foam that have been entrained by thefluid medium 240, flow into the sump 24. In contrast, the expansion gasis extracted via the suction extractor 22 from the closed separationcontainer 2.

In order to avoid the sucking in, or extraction by sucking, of the fillproduct foam via the suction extractor 22, the suction extractor 22 isin fluid communication with the closed separation container 2, and thesuction extractor 22 from the closed separation container 2 is disposedabove the sprinkler nozzle 3.

When the fluid medium 240 in the sump 24 has reached a certain level,which is measured, for example, by an upper level detector 30 in theclosed separation container 2 and/or by the satisfaction of a timingcondition, the sump, and in particular the fluid medium 240 in the sump,is discharged via the pump 244 to a waste water pipe 248 through theoperation of the appropriate valves. The pump 244 and the appropriatevalves for transfer of the fluid medium 240 from the sump 24 to thewaste water pipe 248 are kept open or in operation until a lower leveldetector 32 detects that the fluid medium 240 in the sump 24 has reacheda level that is at or below a specified lower level. The previouslyopened valves are then closed and the valve for the sprinkler nozzle 3is opened, so that the fluid medium 240 is again pumped from the sump 24to the sprinkler nozzle 3, and accordingly circulated such that themixture of expansion gas and fill product foam that has accumulated inthe closed separation container 2 is again sprinkled with the fluidmedium 240.

After production has finished, the sump 24 can be emptied fully into agully 25, for example, by opening an appropriate valve.

There thus results an efficient method for treating a mixture ofexpansion gas and fill product foam in a beverage filling plant 100.

In order to carry out cleaning and sterilization of the beverage fillingplant 100 after the production run has finished, a cleaning process isperformed through a closed cleaning cycle. For this purpose, a cleaningor sterilization medium is supplied as a so-called CIP medium via thefill product intake 132 to the valve cluster 130 in the known manner,and then flows via the fill product rotary medium distributor channel120 through the filler valve in order to clean or sterilize the fillervalve itself. From the filler valve, the CIP medium is then conveyed viaa CIP return line 128 back to the valve cluster 130.

Through a CIP supply line 40, the CIP medium can also be channeled fromthe filler valve cluster 130 to a CIP nozzle 42, which is disposed inthe upper area of the closed separation container 2. The CIP nozzle 42is, for example, designed as a 360° nozzle, so that the entire interiorwall of the closed separation container 2 can be impinged with cleaningor sterilization medium. In this manner, the closed separation container2 can be fully cleaned by impingement with the CIP medium. Via theoutlet 242 and the pump 244, with appropriate switching of the valves,the CIP medium is returned via a CIP return line 44 to the valve cluster130. The cleaning is thus carried out in a cycle with no mediumdischarged; instead, the cleaning medium is recirculated through theclosed separation container 2 in the manner described above.

In an alternative or further embodiment, the CIP medium can also flowout of the valve cluster 130 into the closed separation container 2 viathe relief line 20, in order to enable the cleaning of the relief line20.

FIG. 2 shows schematically the closed separation container 2, in aschematic side representation, wherein the sprinkler nozzle 3 in theinterior is shown by a broken line and the intake of the relief line 20is also shown schematically. Additionally shown are the sump 24 in thelower area of the closed separation container 2, and the outlet 242. Viaa waste water connection 248 and a fresh water connection 246, theclosed separation container 2 can be supplied with fresh water and thewaste water can be discharged.

A CIP supply line 40 along with the CIP nozzle 42 are shown, which areprovided in the interior of the closed separation container 2, and whichserve to clean or sterilize the interior wall of the closed separationcontainer 2 in the manner described above.

Through the suction extractor 22 disposed in the upper area of theclosed separation container, the expansion gas is extracted from theclosed separation container 2.

FIG. 3 again shows the device of FIG. 2 in a schematic perspective view.

To the extent applicable, all individual features described in theexample embodiments can be combined with each other and/or exchanged,without departing from the field of the invention.

LIST OF REFERENCE SIGNS

-   1 device for treating a mixture of expansion gas and fill product    foam-   100 beverage filling plant-   110 filler carousel-   120 fill product supply line-   122 CO₂ supply line-   124 CO₂ relief line-   126 vacuum-   128 CIP return line-   130 valve cluster-   132 fill product intake-   134 CIP return flow line-   136 CO₂ supply line-   138 vacuum connection-   2 closed separation container-   20 relief line-   22 suction extractor-   24 sump-   240 medium-   242 outlet-   244 pump-   246 fresh water-   248 waste water-   25 gully-   3 sprinkler nozzle-   30 upper level detector-   32 lower level detector-   40 CIP supply line-   42 CIP nozzle-   44 CIP return line

The invention claimed is:
 1. A method for treating a mixture of anexpansion gas and a fill product foam in a beverage filling plant,comprising the steps of: removing the mixture of the expansion gas andthe fill product foam from a fill product; introducing the mixture intoa closed separation container after the mixture is removed from the fillproduct; and extracting the expansion gas out of the closed separationcontainer via suction.
 2. The method of claim 1, further comprisingsprinkling a fluid medium on the mixture after the mixture is introducedinto the closed separation container.
 3. The method of claim 2, whereinthe sprinkling comprises applying the fluid medium by using a sprinklernozzle that is accommodated in the closed separation container.
 4. Themethod of claim 3, wherein the extracting comprises using suction abovethe sprinkler nozzle to extract the expansion gas.
 5. The method ofclaim 2, wherein the sprinkling comprises extracting the fluid mediumfrom a lower area of the closed separation container and recirculatingthe fluid medium, and wherein the lower area of the closed separationcontainer comprises a sump.
 6. The method of claim 2, further comprisingperiodically conveying the fluid medium and the fill product foam out ofthe closed separation container.
 7. The method of claim 1, wherein theintroducing comprises tangentially introducing the mixture into theclosed separation container.
 8. The method of claim 1, furthercomprising cleaning the closed separation container.
 9. The method ofclaim 8, wherein the cleaning comprises: spraying at least one of acleaning medium and a sterilizing medium onto an interior wall of theclosed separation container; and conducting at least one of the cleaningmedium and the sterilization medium out of a lower area of the closedseparation container.
 10. A device for performing the method of claim 1,the device comprising: the closed separation container, wherein theclosed separation container is configured to be coupled to a relief lineto receive the mixture into the closed separation container andconfigured to be coupled to a suction extractor so that the expansiongas is extracted from the closed separation container via suction fromthe suction extractor.
 11. The device of claim 10, further comprising asprinkler nozzle disposed in the closed separation container, whereinthe sprinkler nozzle applies a fluid medium to the mixture of theexpansion gas and the fill product foam that is present in the closedseparation container.
 12. The device of claim 11, wherein a lower areaof the closed separation container comprises an outlet.
 13. The deviceof claim 12, wherein the outlet is in fluid communication with thesprinkler nozzle so that the fluid medium recirculated from the lowerarea of the closed separation container to the sprinkler nozzle.
 14. Thedevice of claim 12, wherein the lower area of the closed separationcontainer comprises a sump.
 15. The device of claim 11, furthercomprising the suction extractor, wherein the suction extractor is influid communication with the closed separation container and is disposedabove the sprinkler nozzle.
 16. The device of claim 10, wherein theclosed separation container is at least substantially cylindrical and/orsubstantially conical.
 17. The device of claim 10, further comprisingthe relief line, wherein the relief line is tangentially coupled to theclosed separation container.
 18. The device of claim 10, furthercomprising a clean-in-place (CIP) nozzle provided in the closedseparation container, wherein the CIP nozzle is configured to impinge onan interior wall of the closed separation container with a CIP medium.19. The device of claim 18, further comprising a CIP return line that isin fluid communication with a lower area of the closed separationcontainer.
 20. The method of claim 1, wherein the mixture consists ofthe expansion gas and the fill product foam.